KR100964464B1 - Display unit - Google Patents

Abstract

The present invention provides a display device that is easily assembled with high assembly accuracy, has high productivity, and has a small number of parts and a low number of assembly steps. To this end, the transparent electrode plate 20 is sandwiched between the two transparent display panels 10 and 30. Light from the first and second LEDs 25 and 26 disposed on the front and back surfaces of the electrode plate 20 is incident on the side cross-sections of the transparent display panels 10 and 30. The light is reflected by a plurality of minute dimples provided on one side of the transparent display panels 10 and 30 so as to display patterns such as letters, symbols, and figures uniformly.

Description

Display unit {DISPLAY UNIT}

The present invention relates to a display device, in particular a display device having a switch function.

Background Art Conventionally, as a display device, a plurality of display bodies are simultaneously or simultaneously formed by forming a plurality of reflective dots having a light transmissive, small concave portion, and plural light guide plates arranged with light sources on one side. There is a light spot indicator that displays alternately (see Patent Document 1).

Patent Document 1: Japanese Patent No. 3503608

Disclosure of Invention

Problems to be Solved by the Invention

However, the above-described light point indicator requires another substrate including a plurality of light sources as shown in FIG. 1 of Patent Document 1. As shown in FIG. For this reason, there are many parts and many assembly processes. Moreover, in the said light spot type | mold display, although it is necessary to arrange | position a light source with high positioning precision with respect to the narrow side cross section of a light guide plate, it is not easy to assemble with high positioning precision, laborious for positioning work, and productivity is low. Has a problem.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a display device which is simply assembled with high assembly accuracy, has high productivity, and has a small number of parts and a low number of assembly steps.

Means to solve the problem

In order to solve the said subject, the display apparatus which concerns on this invention makes it uniform by injecting the light of a light source into at least 1 or more transparent display panels, respectively, and reflecting it in the many small dimples provided in at least one side of the said transparent display panel. Or, it is set as the structure so that patterns, such as a character, a figure, and a symbol, can be seen.

In particular, while the transparent electrode plate is sandwiched between the plurality of transparent display panels, the light of the plurality of light sources respectively disposed on the front and back surfaces of the electrode plate is incident on the side end surface of the transparent display panel. By reflecting at least a number of minute dimples provided on at least one surface, a configuration is made so that patterns such as letters, figures, and symbols can be seen.

Effects of the Invention

According to the present invention, the light source can be easily positioned on the side end surface of the transparent display panel only by stacking the transparent electrode plate on the transparent display panel, or only by inserting the transparent electrode plate onto the plurality of transparent display panels. For this reason, it is easy to assemble with high assembly precision, and productivity is high. In addition, since only the light sources are disposed on the front and back edges of one electrode plate, the display device can be obtained with fewer parts and fewer assembly steps.

As another invention which concerns on this invention, the light from the light source provided in the said electrode plate injects into the side end surface of the at least 1 or more transparent display panel laminated | stacked on the electrode plate, respectively, and many microscopic numbers provided in at least one side of the said transparent display panel By reflecting from a dimple, it is set as the structure which the pattern of a character, a figure, a symbol, etc. can be seen uniformly.

According to the present invention, a plurality of transparent display panels are stacked on one electrode plate, and the light source can be easily positioned on the side end surface of the transparent display panel only by arranging the light sources. For this reason, it is easy to assemble with high assembly precision, and productivity is high. In addition, since light can be emitted to a plurality of electrode plates only by disposing a light source on one electrode plate, a display device having a small number of parts and a number of assembly steps can be obtained.

As an embodiment according to the present invention, a light guide portion for receiving light from a light source disposed on an electrode plate at one side edge of the transparent display panel and guiding the side end surface of the transparent display panel may be provided.

According to this embodiment, since light leakage is lost and all the light of a light source can be used for pattern display of a character, a figure, a character, etc., the display device with high efficiency can be obtained.

As another embodiment of the present invention, a light-diffusion sheet and a punching hole for displaying patterns such as letters, figures, and symbols between the transparent display panel disposed closest to the electrode plate and the electrode plate. A light shielding mask having a light shielding mask may be disposed, and a light source for a pattern may be disposed at a position facing the punching hole of the light shielding mask.

According to the present embodiment, various types of display are possible through the light shielding mask having punching holes by emitting light not only from the side end surface of the transparent display panel but also from the bottom surface.

As another embodiment which concerns on this invention, the reflective surface of the light shielding mask may be low reflectance.

According to this embodiment, the difference between the brightness | luminance in the area | region of the punching hole which forms a pattern, and the brightness | luminance of other area | regions becomes small, so-called black unevenness is eliminated and a character etc. can be displayed uniformly.

As another embodiment which concerns on this invention, a transparent display board may be replaceable.

According to this embodiment, the characters which can be displayed etc. can be changed as needed, and it is convenient.

As a new embodiment of the present invention, at least one dimple of the transparent display panel may be randomly arranged.

According to this embodiment, by arrange | positioning the dimples of a transparent display board at random, the interference of the light between the opposing transparent display panels disappears. For this reason, the light radiated | emitted from the light source can spread | diffuse uniformly and can display a character etc. with uniform brightness.

As another embodiment which concerns on this invention, you may provide the control circuit which detects the change of the electrostatic capacitance between the electrode provided in the electrode plate, and a reference electrode, and controls ON / OFF of a light source.

According to this embodiment, the display apparatus with a switch function which has the above-mentioned effect can be obtained.

As another display device according to the present invention, a diffusion sheet and at least one or more transparent display panels are sequentially arranged on the visible side of a light shielding mask having a punching hole for displaying patterns such as letters, figures, symbols, and the like, and the transparent display panel The light of the light source is incident on the side end surface of the light source, is reflected by a plurality of minute dimples provided on at least one side of the transparent display panel, and the light of the light source provided at a position facing the punching hole of the light shielding mask. In this case, the punching hole and the transparent display panel may be made to pass through and be viewed.

According to the present invention, a display device capable of various kinds of displays can be obtained by simply disposing the diffusion sheet and the transparent display panel sequentially in the light shielding mask having the punched hole. For this reason, it is easy to assemble with high assembly precision, and productivity is high. In addition, since the pattern of the light shielding mask can be overlaid and displayed in the transparent display panel, a display device capable of displaying various types with a small number of parts and an assembly process can be obtained.

As embodiment which concerns on this invention, you may arrange | position a diffusion sheet to the front and back surface of a light shielding mask.

According to this embodiment, it is possible to display so that the presence position of a light source cannot be recognized by spreading the light of a light source uniformly using two diffusion sheets. In particular, with the thinning of the device, even when the diffusion distance cannot be sufficiently secured, the light can be uniformly diffused and displayed so that the presence position of the light source cannot be recognized.

As another embodiment which concerns on this invention, while spreading | diffusion sheet is arrange | positioned to the visible surface side of a light shielding mask, you may arrange | position a diffusion lens on the back surface side of the said light shielding mask.

According to the present embodiment, even when the diffusion distance cannot be sufficiently secured due to the thinning of the device, the light can be uniformly diffused through the diffusion sheet and the diffusion lens, and the display can be displayed such that the presence position of the light source cannot be recognized. .

As another embodiment which concerns on this invention, you may provide the light guide part which receives the light of a light source in at least one edge of a transparent display panel, and guides to the side cross section of the said transparent display panel.

According to this embodiment, since the leakage of light disappears and the light of a light source can be displayed uniformly or all as a pattern of a letter, a figure, a symbol, etc., the display device with high efficiency can be obtained.

As another embodiment of the present invention, by diffusing the light of the light source from the light diffusion portion provided between the light guide portion and the fine dimple of the transparent display panel, it is possible to see patterns such as letters, figures, and symbols uniformly. You can also let it.

According to the present embodiment, by diffusing the light in the diffuser, luminance unevenness and bright lines can be suppressed, and patterns such as letters, figures, and symbols can be displayed uniformly. In addition, various types of display are possible by combining the display of the transparent display panel itself and the pattern displayed through the punching hole of the light shielding mask.

As another embodiment which concerns on this invention, the surface where a light shielding mask is seen may be low reflectance.

According to this embodiment, the difference between the brightness | luminance in the area | region of the punching hole which forms a pattern, and the brightness | luminance of other area | regions becomes small, so-called black unevenness is eliminated and a character etc. can be displayed uniformly.

As another embodiment which concerns on this invention, a transparent display board may be replaceable.

According to this embodiment, the characters which can be displayed etc. can be changed as needed, and it is convenient.

As a new embodiment of the present invention, the dimples may be arranged randomly.

According to this embodiment, by arrange | positioning the dimples of a transparent display board at random, the interference of the light between the opposing transparent display panels disappears. For this reason, the light radiated | emitted from the light source spreads uniformly, and there exists an effect that a character etc. can be displayed with uniform brightness.

1 is an exploded perspective view showing a first embodiment of a display device according to the present invention.

2A and 2B are a left side view and a front view of the substrate shown in FIG.

3A and 3B are front views of the display device shown in FIG. 1 and cross-sectional views taken along line B-B in FIG. 3A.

4 (A), 4 (B), and (C) are partial front views illustrating an example of a display mode according to the first embodiment.

5A and 5B are cross-sectional views showing the light-transmitting state of the display panel shown in FIG. 1.

6A and 6B are front views illustrating dimples of the display panel;

7 (A), (B), (C) and (D) are time charts for explaining the operation method of the first embodiment.

8 is an exploded perspective view showing a second embodiment of the display device according to the present invention.

FIG. 9A is a front view of the second embodiment, and FIG. 9B is a sectional view taken along the line B-B in FIG. 9A.

10 is an exploded perspective view showing a third embodiment of the display device according to the present invention.

FIG. 11A is a semi-front view of the third embodiment, and FIG. 11B is a sectional view taken along the line B-B in FIG. 11A.

12 is an exploded perspective view showing a fourth embodiment of the display device according to the present invention.

13A and 13B are main parts exploded perspective views and main parts perspective views;

FIG. 14A is a plan view of the display device illustrated in FIG. 11, and FIG. 14B is a sectional view taken along the line B-B in FIG. 14A.

15A and 15B are cross-sectional views showing a case where so-called black spots are generated and a plan view showing a state where black spots are generated, and FIGS. 15C and 15D show a case where so-called black spots do not occur. A top view showing a cross-sectional view and a state in which black spots do not occur.

16 is an exploded perspective view showing a fifth embodiment of the display device according to the present invention.

FIG. 17A is a plan view of the display device illustrated in FIG. 16, and FIG. 17B is a sectional view taken along the line B-B in FIG. 17A.

18A and 18B are a perspective view and a front view of the surface side of the base shown in FIG.

19A and 19B are a perspective view and a bottom view of the back side of the base shown in FIG.

20A and 20B are perspective views of the light shielding mask and the diffusion sheet shown in FIG. 16.

21A and 21B are perspective views seen from different angles of the transparent display panel illustrated in FIG. 16.

22A and 22B are perspective views of the front side and the back side of the cover illustrated in FIG. 16.

23 is a perspective view for explaining the assembling method.

24A to 24D are front views illustrating an operating state of the display device illustrated in FIG. 16.

25A to 25D are front views illustrating another operating state of the display device illustrated in FIG. 16.

Fig. 26 is an exploded perspective view showing a sixth embodiment of the display device according to the present invention.

FIG. 27A is a plan view of the display device illustrated in FIG. 26, and FIG. 27B is a sectional view taken along the line B-B in FIG. 27A.

28 is an exploded perspective view showing a part of a seventh embodiment of a display device according to the present invention.

29 is an exploded perspective view showing a part of an eighth embodiment of a display device according to the present invention.

(Explanation of symbols for the main parts of the drawing)

10: first display plate 11: annular rib

12: recessed portion for storage 13: recessed portion for storage

14 first display portion 20 electrode plate

21: transparent electrode plate body 22: printed circuit board

23 connector 24 control IC chip

25: first LED 26: second LED

30: second display panel 31: annular end

32: bulge portion 33: notch for positioning

40: cover 41: opening

50: transparent electrode plate 51, 52, 53: first, second, third LED

60: first display panel 61: light guide portion

62: notch for positioning 70: second display plate

71: light guide portion 80: cover

81: opening 82: positioning projection

90: shading mask 91: punch hole

93 thin film 95 light diffusion sheet

99: dimple 100: printed circuit board

111 to 115: first to fifth LEDs 120:. Base

121, 123, 124: 1st, 2nd, 3rd light guide groove 122, 125: 1st, 2nd light guide hole

121a to 425a: tapered surface 130: light shielding mask

131, 132, 133: 1st, 2nd, 3rd shading part 135, 136: Punching hole

140: diffusion sheet

151, 152 and 153: first, second and third transparent display panels

151a, 152a, 153a: Light guide part 160: Cover

161, 162, 163: first, second, third openings 170, 171: diffusion sheet

172: Diffusion Lens

To practice the invention  Best form for

EMBODIMENT OF THE INVENTION Embodiment which concerns on this invention is described according to attached drawing of FIGS.

1st Embodiment is a case where it applies to the display apparatus with a switch function, As shown in FIGS. 1-7, the 1st display panel 10 which functions as a base, the electrode plate 20, and the 2nd display panel ( 30 and the cover 40.

The first display panel 10 is a molded article made of a transparent acrylic resin and a polycarbonate resin, and may be an elastic body having flexibility. The first display panel 10 is one step lower than the storage recesses 12 and the storage recesses 12 in the annular ribs 11 formed on one side outer peripheral edge thereof. A storage recess 13 is provided. In the first display panel 10, the bottom surface of the storage recess 12 is used as the first display unit 14. In addition, on one side of the first display unit 14, as shown in FIG. 5, a number of minute dimples 99, which are difficult to be recognized by the human eye, for example, appears in the text of "on sale". It is prepared. For this reason, when light enters the thickness direction of the said 1st display part 14, since it passes through the dimple 99 without reflecting it, the said 1st display panel 10 looks transparent (FIG. 4). (A)). However, when light is incident on the side surface of the first display panel 10 from the first LED 25 described later, the light is reflected and scattered on the dimple 99, and the word "on sale" appears. 4 (B)).

The electrode plate 20 has a transparent electrode plate body 21 having a planar shape that can be fitted to the recess 12 for storage of the first display panel 10, and one side edge of the transparent electrode plate body 21. It consists of the printed board 22 electrically connected. The connector 23 and the control IC chip 24 are mounted on one side of the printed board 22. The control IC chip 24 detects a change in capacitance between an electrode pattern (not shown) provided on the electrode plate 20 and a reference electrode having a potential such as GND to output an on / off signal. It has an input / output circuit and the control circuit which controls lighting of the 1st, 2nd LEDs 25 and 26 mentioned later. The printed circuit board 22 connects the first LEDs 25 to the notches provided on the one side edge thereof, and is electrically connected thereto, and the second LED 26 is mounted on the one side edge thereof.

The transparent electrode plate main body 21 and the printed circuit board 22 are fitted to the storage recesses 12 and the recesses 13 of the first display panel 10, respectively, to position the first display panel 10. The first LED 25 abuts on one side end surface of the display portion 14 (FIG. 3B).

The second display panel 30 has a planar shape that can be fitted into the recessed recess 12 for the first display panel 10, and has a bulge portion in the annular end portion 31 provided at the periphery of one side thereof. 32). In addition, as shown in FIG. 5, the second display panel 30, like the first display panel 10, includes a plurality of minute dimples 99 that are difficult to be recognized by human vision on one surface thereof, for example. The word "sold out" comes to mind. For this reason, when light enters the thickness direction of the said 2nd display panel 30, since it passes through the dimple 99 without reflecting it, the said 2nd display panel 30 looks transparent (FIG. 4). (A)). However, when the light of the second LED 26 is incident on the side end surface of the second display panel 30, the light is reflected and scattered on the dimple 99, resulting in the word "sold out" (Fig. 4). (C)).

Then, the second LED 30 is mounted on one side end surface of the second display panel 30 by fitting and positioning the second display panel 30 to the recess 12 for storage of the first display panel 10. 26) abuts (FIG. 3B).

The cover 40 has a planar shape that can cover the surface of the first display panel 10, and has an opening 41 that can be fitted to the bulge 32 of the second display panel 30.

The electrode plate 20 and the second display panel 30 are fitted into the first display panel 10 and the cover 40 by assembling and fixing the cover 40 to the first display panel 10. While being supported, the bulging portion 32 of the second display panel 30 is exposed from the opening 41 of the cover 40.

In addition, although the dimple 99 provided in the said 1st, 2nd display panels 10 and 30 needs to be arrange | positioned so that a pattern of a predetermined | prescribed character, a symbol, a figure, etc. may float, it is FIG. 6 in the arrange | positioned range. As shown to (A) of FIG. 6, you may arrange | position regularly, and may arrange | position randomly as shown to FIG. 6 (B). When arranged regularly in a lattice shape, the light passing through the first display panel 10 may interfere with the second display panel 30, thereby partially lowering the brightness, and it may be difficult to display characters and the like uniformly. However, by arranging the dimples 99 at random, it is possible to avoid incompatibility due to interference of light. In addition, in order to avoid similar incompatibility, the shape, pitch, etc. of a dimple may be changed.

In addition, a spot shape may be arranged on one side of the first and second display panels 10 and 30 to make it difficult to see the dimples. In addition, by providing a stripe, the shape may be changed while making it more visible. A liquid crystal screen may be arranged on the lowermost side to display a moving image. In addition, it is not necessary to arrange all LEDs on the printed board 22, for example, you may arrange | position the 2nd LED 26 to the long side edge part of the 2nd display panel 30. As shown in FIG.

Next, the operation of the display device will be described.

For example, when used as a display device, as shown in FIG. 7A, only the first LED 25 lights up while the input signal is on, so that the first display unit 14 is turned on. Light is incident on one side of the cross-section, and the word " on sale " appears to inform the user that it can be sold. Then, when the input signal is turned off, the first LED 25 is turned off, the second LED 26 lights up, and the word "sold out" appears, which is sold out and cannot be sold. Inform. When the input signal is turned on again, the first LED 25 lights up as described above, the second LED 26 goes out, and the display characters are switched.

The display device according to the present embodiment may not only display the above-mentioned characters, but also may display arbitrary patterns such as other characters, figures, and symbols. As the operation method of such a display device, for example, as shown in FIG. 7B, the first LED 25 and the second LED 26 are operated while the input signal is in the ON state. While the lamp is turned on at the same time and the input signal is in the off state, the first LED 25 and the second LED 26 may be turned off at the same time.

As shown in FIG. 7C, while the input signal is in the ON state, the first LED 25 is turned off and the second LED 26 lights up. In addition, when the input signal is turned off, the second LED 26 may be turned on, and the first LED 25 and the second LED 26 may be turned off simultaneously while the input signal is turned off.

In addition, as a control method in the case of using the said display apparatus as a display apparatus with a switch function, as shown in FIG.7 (D), for example, by touching the 1st display panel 30 with a finger, The control circuit IC chip 24 detects a change in capacitance between an electrode pattern (not shown) provided on the electrode plate 20 and a reference electrode having a potential such as GND, and outputs an output signal to output the first LED. The 25 LEDs are turned on while the second LED 26 is turned off. Then, by touching the first display panel 30 again with a finger, the control circuit IC chip 24 detects the change in the capacitance of the electrode plate 20, and stops the output signal to the first LED 25. The output signal is output to the second LED 26 and turned on.

In addition, in the above operation, by turning on and off the first LED 25 and the second LED 26 repeatedly for a predetermined time, other characters may be displayed alternately. In addition, the 1st LED 25 and the 2nd LED 26 do not need to be the same color, For example, you may use combining a blue LED and a red LED. .

As shown in FIG. 8 and FIG. 9, the second embodiment is a case of configuring a display device with a plurality of continuous switch functions.

That is, 2nd Embodiment consists of the 1st display panel 10 which functions as a base, the electrode plate 20, the 2nd display panel 30, and the cover 40. As shown in FIG.

The first display panel 10 is a molded article made of a transparent acrylic resin and a polycarbonate resin, and may be an elastic body having flexibility. The first display panel 10 is provided with a receiving recess 12 and a receiving through hole 15 in the annular rib 11 formed at the outer peripheral edge of one side thereof. In the long side edge part of the said storage recess 12, the recessed part 16 for accommodating the 1st LED 25 mentioned later is formed in predetermined pitch. The first display panel 10 has a bottom surface of the storage recess 12 as the first display portion 14. For example, when light is incident on one side of the region corresponding to the bulge 32 of the second display panel 30 to be described later, for example, a large "○" appears. Many small dimples (not shown) are provided. However, when light enters the thickness direction of the said 1st display part 14, since it passes through the dimple 99 without reflecting it, the said 1st display panel 10 looks transparent.

The electrode plate 20 includes a transparent electrode plate body 21 having a planar shape that can be fitted to the recess 12 for storage of the first display panel 10, and a short edge portion of the transparent electrode plate body 21. It consists of a printed circuit board 22 electrically connected to it. The printed circuit board 22 mounts the control IC chip 24 on its surface and mounts the connector 23 on its back surface. Moreover, while the said 1st LED 25 was dropped in the notch part provided in the long side edge part, the said transparent electrode plate main body 21 has arrange | positioned the 2nd LED 26 in the long side single edge part. In addition, the first and second LEDs 25 and 26 are electrically connected to the print substrate 22 through the lead wires 27.

The transparent electrode plate main body 21, the connector 23, and the first LED () in the storage recesses 12, the storage through-holes 15, and the recesses 16 of the first display panel 10. 25) are fitted to each other for positioning. As a result, the first LED 25 abuts on one side end surface of the first display unit 14.

The second display panel 30 has a planar shape that can be fitted into the recessed recess 12 for the first display panel 10, and the bulging portion 32 is formed in a plurality of continuous annular end portions 31 provided on one side thereof. Each is prepared. Moreover, the positioning notch part 33 is provided in the one edge of the said ring-shaped end part 31. As shown in FIG. In addition, when the light is incident on the side end surface similarly to the first display panel 10, the bulging portion 32 has a number of minute dimples (a large number of inward faces) such that a small "○" is raised. Not shown). However, when light enters in the thickness direction of the second display panel 30, the light passes through the dimple 99 without being reflected, so that the second display panel 30 is transparent.

Then, the second display panel 30 is positioned in the recess 12 for storing the first display panel 10, thereby positioning the second notch portion 33 in the bulging portion 32. LED 26 is assembled.

The cover 40 has a planar shape that can cover the surface of the second display panel 30, and a plurality of openings 41 that can be fitted to the bulging portions 32 of the second display panel 30 respectively. We add in pitch.

The electrode plate 20 and the second display panel 30 are fitted into the first display panel 10 and the cover 40 by assembling and fixing the cover 40 to the first display panel 10. It is supported, and the bulging part 32 is exposed from the opening part 41 of the cover 40.

According to this embodiment, when a finger touches the bulging part 32 of the 2nd display panel 30, for example, between the electrode pattern (not shown) provided in the electrode plate 20, and reference potentials, such as GND, is provided. When a control IC chip 24 that detects a change in capacitance of the controller outputs an output signal to only the first LED 25 and lights it up, only a large "○" is displayed. Subsequently, by touching the second display panel 30 again, the control IC chip 24 that detects the change in capacitance outputs and outputs an output signal to the second LED 26 to display a small "○". do. Therefore, "◎" can be displayed by lighting up the said 1st, 2nd display panels 10 and 30 simultaneously. In addition, by lighting only one LED, only a large "○" or a small "○" may be displayed in a different color.

10 and 11, the third embodiment includes a transparent electrode plate 50, a first display plate 60, a second display plate 70, and a cover 80 that function as a printed board. It is a display device with a switch function. The transparent electrode plate 50 is provided with printed wirings (not shown), and the first and second LEDs 51, 52 are mounted at predetermined positions.

The first display panel 60 is a rectangular plate made of a transparent resin that can be mounted on the transparent electrode plate 50, and a light guide portion 61 having a tapered surface is formed on the upper side of the short edge portion. In the first display panel 60, positioning notches 62 are provided at edge portions of the remaining short sides and both edges of the base portion of the light guide portion 61, respectively. In addition, a plurality of minute dimples (not shown) are provided on the bottom surface of the first display panel 60 to display patterns such as letters, symbols, and figures. However, even if light enters in the thickness direction of the first display panel 60, since the light does not reflect on the dimple, the first display panel 60 appears to be transparent.

The second display panel 70 is a rectangular plate made of a transparent resin that can be mounted on the transparent electrode plate 50 similarly to the first display panel 60, and has a light guide portion 71 having a tapered surface on the lower surface of the short edge portion. Is formed. In the second display panel 70, positioning notches 72 are provided at both edge portions of the remaining short sides and both edges of the base portion of the light guide portion 71. In addition, a plurality of minute dimples (not shown) are provided on the bottom surface of the second display panel 70 to display patterns such as letters, symbols, and figures. However, even if light enters in the thickness direction of the second display panel 70, since the light does not reflect on the dimple, the first display panel 70 appears to be transparent.

The cover 80 is mounted on the transparent electrode plate 50 to have a box shape with a low bottom for covering and storing the first and second display panels 60 and 70. In addition, the cover 80 has an opening 81 through which the first and second display panels 60 and 70 can be seen, and two sets of positioning projections 82 are provided near the corners of the opposing inner surfaces. ) To face each other.

In assembling the third embodiment, the first display panel 60 and the second display panel 70 are stacked and positioned between the first and second LEDs 51 and 52 mounted on the transparent electrode plate 50. do. In addition, the cover 80 is fixed to the transparent electrode plate 50 to cover the first and second display panels 60 and 70. For this reason, the positioning projection 82 of the cover 80 engages with the notches 62 and 72 of the first and second display panels 60 and 70, respectively, and the first and second display panels 60 and 70. Location). Further, the first LED 51 abuts on the side end surface of the light guide portion 61 of the first display panel 60, and the second LED (on the side end surface of the light guide portion 71 of the second display panel 70. 52) abuts.

By lighting the first and second LEDs 51 and 52 alternately or at the same time, two types of characters and the like can be floated and displayed at the same time.

As shown in Figs. 12 to 15, the fourth embodiment is a display device capable of displaying three different types of patterns such as letters, symbols, and figures.

That is, the light shielding mask 90 and the light diffusion sheet 95 are interposed between the first and second display panels on the transparent electrode plate 50 on which the first, second, and third LEDs 51, 52, 53 are mounted. 60 and the second display panel 70 and the cover 80 are stacked in this order. In addition, the said transparent electrode plate 50 does not necessarily need to be transparent, For example, you may comprise with a simple printed board.

The light shielding mask 90 is a punching hole that mimics the outline of a pattern such as a character, a symbol, or a figure in order to display a pattern of a predetermined character, symbol, or figure by the light of the third LED 53. (91). The light shielding mask 90 is made of a material having a high reflectance, for example, a SUS material. In this embodiment, the punching hole 91 which imitated the outline of the envelope is provided, for example in order to display an E-mail (FIG. 14 (A)).

In the present embodiment, for example, as shown in FIG. 15C, the thin film 93 is formed so as to lower the reflectance of the surface on the cover 80 side of the light shielding mask 90. The lower reflectance is for eliminating so-called black spots.

That is, as shown in FIG. 15A, when the reflectance of the surface on the cover 80 side of the light shielding mask 90 is high, all of the external light 96 that touches the light shielding mask 90 reflects brightly. see. On the other hand, as shown in FIG. 15C, since the external light 97 passes through the punching hole 92 of the light shielding mask 90, the reflected light is small and a phenomenon called black unevenness occurs. (FIG. 15B). When such black spots occur, patterns such as letters, symbols, figures, and the like to be hidden can be seen, resulting in abnormalities. For this reason, when the thin film 93 which reduces the reflectance of light is provided on the surface of the cover 80 side of the light shielding mask 90, all the external light 96 which touched the thin film 93 of the light shielding mask 90 is not reflected. (FIG. 15C). As a result, the difference between the brightness of the area | region in which the punching hole 92 was provided and the brightness of other area | regions becomes small, and it becomes difficult to produce black spots as mentioned above (FIG. 15D).

As a method of forming a thin film for making reflectance low, coating, plating, printing, vapor deposition, etc. are mentioned, for example. Moreover, as a method of making a reflectance low without forming a thin film, for example, providing a fine unevenness | corrugation in the surface, making it rough surface, or forming a light shielding mask with the black material of low reflectance is mentioned, for example. have. It is most preferable to make the reflectance of the surface on the cover 80 side of the light shielding mask 90 equal to the portion of the punching hole 92 of the light shielding mask in this manner, but when the reflectance is set to 5% or less, black spots Rarely

The light diffusion sheet 95 conceals the punching hole 91 and uniformly diffuses the light emitted from the LED, and has the same planar shape as the light shielding mask 90. As the light-diffusion sheet 95, the polycarbonate film surface-treated is mentioned, for example.

As shown in FIG. 12, the 1st display panel 60 is a transparent resin molded article, has a flat shape which can coat | cover the said light-diffusion sheet 95, and has a light guide part from the front corner part of the one side edge part. 61 is serialized. The light guide portion 61 is for introducing and uniformly diffusing the light of the first LED 51 radiated in the thickness direction. The first display panel 60 is displayed uniformly with light introduced from the light guide portion 61 in the same manner as in the above-described embodiment, or a pattern such as a desired character, symbol, figure, or the like is displayed. Many fine dimples (not shown) are provided for this purpose.

The second display panel 70 is a transparent resin molded article, has a planar shape capable of covering the light diffusing sheet 95, and extends from the corner portion on the opposite side of the one side edge thereof. The light guide portion 71 is for introducing and uniformly diffusing the light of the second LED 52 radiated in the thickness direction. In addition, similarly to the above-described embodiment, the second display panel 70 is uniformly displayed with the light introduced from the light guide portion 71, or a pattern such as a desired character, symbol, figure, or the like is displayed. Many fine dimples (not shown) are provided for this purpose.

The cover 80 has a box shape with a low bottom which covers and accommodates the first and second display panels 60 and 70. The cover 80 has an opening 81 through which the second and first display panels 70 and 60 can be seen at the center of the bottom, and three leg portions 83 are provided on the bottom thereof. Is rushing. The leg portion 83 can be inserted into the positioning hole 54 provided in the transparent electrode plate 50.

As an assembly method of 4th Embodiment, the 1st, 2nd, 3rd LEDs 51, 52, 53 are mounted on the transparent electrode plate 50. As shown in FIG. On the other hand, the second and first display panels 70 and 60, the light diffusion sheet 95 and the light shielding mask 90 are sequentially stacked and integrated on the bottom surface of the cover 80. Subsequently, the leg portions 83 of the cover 80 are inserted into the positioning holes 54 of the transparent electrode plate 50 to be assembled, thereby guiding the light guide portions of the first and second display panels 60 and 70. The first and second LEDs 51 and 52 abut on the lower surfaces of the 61 and 71, respectively, and the third LED 53 faces the lower surface of the punching hole 91 of the light shielding mask 90.

According to the present embodiment, three types of letters, symbols, figures, and the like can be displayed using the three first, second, and third LEDs 51, 52, and 53, and various expressions are possible. . In addition, since all of the three first, second, and third LEDs 51, 52, 53 are located below the first, second display panels 60, 70, a small display device having a small floor area can be obtained. There is an advantage that it can.

As shown in FIGS. 16-25, 5th Embodiment is a display apparatus which can display uniformly from three opening parts of a cover, or can display patterns, such as another character, a symbol, a figure, and the like.

That is, the display device according to the present embodiment includes the printed board 100, the first to fifth LEDs 111 to 115, the base 120, the light shielding mask 130, the diffusion sheet 140, and the like. And first, second, and third transparent display panels 151, 152, and 153, and a cover 160.

The first to fifth LEDs 111 to 115 are mounted at predetermined positions on the surface of the printed board 100, and a light reflecting film is appropriately formed on the surface thereof.

As shown in FIG. 18 and FIG. 19, the base 120 is a resin molded article made of a resin material having a high reflectance. The first light guiding groove 121 has a planar shape that can be mounted on the printed board 100 and a position corresponding to the first to fifth LEDs 111 to 115 mounted on the printed board 100. ), A first light guide hole 122, a second light guide groove 123, a third light guide groove 124, and a second light guide hole 125, respectively. A pair of tapered surfaces 121a, 123a, and 124a are formed at the opening edges of the first, second, and third light guide grooves 121, 123, and 124 on the side of the printed board 100, respectively. Similarly, annular tapered surfaces 122a and 125a are formed at the opening edges of the first light guide hole 122 and the second light guide hole 125 on the side of the printed board 100. As described above, since the base 120 is made of a resin material having a high reflectance, the tapered surfaces 121a to 125a can efficiently reflect the light of the LED and ensure high brightness. However, the base 120 may be formed of a normal resin material, and a reflective film may be formed on the tapered surfaces 121a to 125a, respectively. Further, first, second and third recesses 126a, 126b and 126c for positioning the light shielding mask 130 and the like which will be described later are formed on the surface of the cover 160 side of the base 120. have. The first, second and third recessed portions 126a, 126b, and 126c communicate with each other through the notch grooves 127a and 127b. In addition, the first and second locking pawls 128a and 128b and the notch groove 128c for locking the cover 160 to be described later are formed on the outer surface of the base 120, and other electronic devices are provided. A third locking pawl 128d for locking in the housing of the housing is provided.

The light shielding mask 130 is made of a SUS material having a high reflectance, and as shown in FIG. 20A, the first, second, and third recesses 126a, 126b, The first, second, and third light blocking portions 131, 132, and 133 each having a planar shape that can be fitted to the 126c, and the connecting portions 134 and 134 that can be fitted to the notch grooves 127a and 127b, respectively. In particular, the second light shielding portion 132 is provided with a punching hole 135 that mimics the outline of the envelope for displaying an E-mail. In addition, the third light shielding portion 133 is provided with a punching hole 136 that mimics the external shape of the receiver in order to display a telephone. In this embodiment, like the fourth embodiment, the surface of the light shielding mask 130 on the cover 160 side has a low reflectance.

That is, as a method of forming a thin film for making reflectance low, coating, plating, printing, vapor deposition, etc. are mentioned, for example. Moreover, as a method of making a reflectance low without forming a thin film, for example, providing a fine unevenness | corrugation in the surface, making it into a rough surface, or forming a light shielding mask with the black material of low reflectivity. In this way, it is most preferable to make the reflectance of the surface on the cover 80 side of the light shielding mask 90 equal to the portions of the punching holes 135 and 136 of the light shielding mask, but when the reflectance is set to 5% or less, Black speckles rarely occur.

As shown in FIG. 20B, the diffusion sheet 140 covers the light shielding mask 130, and the first, second, and third recesses 126a and 126b of the base 120. , 126c and the notch grooves 127a and 127b. The diffusion sheet 140 conceals the punching holes 135 and 136 by uniformly diffusing the light of the second and fifth LEDs 112 and 115 passing through the punching holes 135 and 136. In addition, the present position of the second and fifth LEDs 112 and 115 cannot be recognized.

As shown in FIG. 21, the first, second, and third transparent display panels 151, 152, and 153 have first, second, and third recesses 126a, 126b, and 126c of the base 120. The light guide portions 151a, 152a, and 153a that can be fitted into the first, second, and third light guide grooves 121, 123, and 124 by having a planar shape that can be fitted into the groove and being bent at almost right angles. It forms (FIG. 16). In addition, the light incident from the rear surface side of the first, second, and third transparent display panels 151, 152, and 153 passes through. However, the light incident from the light guide portions 151a, 152a, and 153a diffuses through the diffusion elements or the diffusion structure provided in the diffusion portions 151b, 152b, and 153b, and is then reflected by fine dimples to cover later. Radiating from the openings (161, 162, 163) of the (160). If necessary, patterns such as letters, symbols, and figures may be formed in fine dimples to display the patterns. In addition, the fine dimples may be provided anywhere on the front and back surfaces of the transparent display panels 151 to 153, but they may be provided on one side of the base 120. In addition, by providing the diffusion portions 151b, 152b, and 153b, luminance unevenness and bright lines are suppressed, and uniform pattern display is possible.

As shown in FIG. 22, the cover 160 has a surface shape that can be fitted to the surface of the base 120, and corresponds to the light blocking portions 131, 132, and 133 of the light blocking sheet 130, respectively. The 1st, 2nd, 3rd opening part 161, 162, 163 is provided in the position to be made. In addition, the cover 160 includes first, second, and third lockable portions at the outer circumferential edges of the first and second locking pawls 128a and 128b and the notch grooves 128c of the base 120, respectively. The elastic pole parts 164a, 164b, and 164c are formed. In addition, the cover 160 protrudes the position regulating projections 165a and 165b fitted to the notch grooves 127a and 127b of the base 120 on the back surface of the printed board 100.

Therefore, when assembling the display device, the first to fifth LEDs 111 to 115 are mounted at predetermined positions of the printed board 100. Meanwhile, the light blocking mask 130, the diffusion sheet 140, and the transparent display panels 151, 152, and 153 are sequentially positioned on the base 120, and then the first and second stops of the base 120 are positioned. The pawls 128a and 128b and the notch grooves 128c hold the first, second and third elastic pawls 164a, 164b and 164c, respectively (FIG. 23). Subsequently, assembly is completed by fixing the base 120 to the printed board 100.

According to this embodiment, the protrusion which partitions the 1st, 2nd, 3rd concave parts 126a, 126b, 126c of the base 120, and the pair of position adjustment protrusions 165a, 165b of the cover 160 are described. ), The first, second, and third transparent display panels 151, 152, and 153 are partitioned. For this reason, there is an advantage that the first, second, and third transparent display panels 151, 152, and 153 which are adjacent to each other can be made clear without interfering with each other.

Next, the usage method of the said display apparatus is demonstrated based on FIG. 24 and FIG.

That is, for example, when only the third LED 113 corresponding to the second transparent display panel 152 exposed from the second opening portion 162 shown in FIG. 24A is lit, as shown in FIG. Likewise, the light of the third LED 113 is reflected from the light guide portion 152a of the second transparent display panel 152 while reflecting light from the tapered surface 123a of the second light guide groove 123 of the base 120. It enters and it becomes possible to see from the 2nd opening part 162 (FIG. 24 (B)). When only the second LED 112 is turned on, the light reflected from the tapered surface 122a of the first light guiding hole 122 of the base 120 passes through the punching hole 135 of the light shielding mask 130. After that, by passing through the diffusion sheet 140 and the second transparent display panel 152, a pattern for notifying the reception of an E-mail from the second opening 162 can be seen (FIG. 24C). In addition, when the second and third LEDs 112 and 113 are turned on at the same time, the second opening 162 of the cover 160 displays a pattern for notifying the reception of an E-mail in the second transparent display panel 152 that emits light. It can be seen from (FIG. 24D). In particular, since the pattern has a high luminance of the light passing through the punching hole 135 and the pattern can be clearly distinguished in the second opening 162, input and output of other signals and the like can be displayed in various ways.

Similarly, for example, if only the fourth LED 114 corresponding to the third transparent display panel 153 exposed from the third opening 163 of the cover 160 shown in FIG. 25A is lit, The light of the fourth LED 114 is incident from the light guide portion 153a of the third transparent display panel 153 while reflecting from the tapered surface 124a of the light guide groove 124 of the base 120. It becomes possible to see from the 3 opening part 163 (FIG. 25 (B)). When only the fifth LED 115 is turned on, after the light reflected from the tapered surface 125a of the light guide hole 125 of the base 120 passes through the punching hole 136 of the light shielding mask 133, By passing through the diffusion sheet 140 and the 3rd transparent display panel 153, the pattern of the telephone receiver which notifies the incoming call from the 3rd opening part 163 can be seen (FIG. 25C). In addition, when the fourth and fifth LEDs 114 and 115 are turned on at the same time, the third transparent display panel 153 which emits light can be seen from the third opening 163 of the cover 160. (FIG. 25D). In particular, since the luminance of the light passing through the punching hole 136 is high and the pattern can be clearly distinguished in the third opening 163, input and output of other signals and the like can be displayed in various colors.

As shown in FIG. 26 and FIG. 27, 6th Embodiment is the display apparatus which can display uniformly from one opening part of a cover, or can display patterns, such as another character, a symbol, a figure, and the like.

In other words, the display device according to the present embodiment includes a printed circuit board 100, first to fourth LEDs 111 to 114, a base 120, a light shielding mask 130, a diffusion sheet 140, and the like. And a first transparent display panel 154 and a cover 16.

In the printed board 100, the first to fourth LEDs 111 to 114 are mounted at predetermined positions on the surface thereof, and a light reflecting film is appropriately formed on the surface thereof.

As shown in FIG. 26 and FIG. 27B, the base 100 has a planar shape that can be mounted on the print substrate 100. Moreover, the said base 120 is a 1st position in the position corresponding to the said 1st-4th LED 111-114 among the bottoms of the recessed part 120a provided in the center part of the surface of the cover 160 side. The light guide groove 121, the first light guide hole 122, the second light guide hole 125, and the second light guide groove 123 are provided, respectively. Annular tapered surfaces 122a and 125a are formed at the opening edges of the first light guide hole 122 and the second light guide hole 125 on the side of the printed board 100. The base 100 is formed of a resin material that easily reflects LED light, thereby improving reflection efficiency. However, you may form with a normal resin material and also form a reflective film. In addition, locking poles 128a and 128b for locking the cover 160, which will be described later, protrude from the outer side of the short side opposite to the base 120.

The light shielding mask 130 has a planar shape that can be fitted to the concave portion 120a, and is formed of a material having a high reflectance, for example, an SUS material. In the same manner as in the embodiment, it is processed so as to have a low reflectance. Then, at the positions corresponding to the first and second light guiding holes 122 and 125, a punching hole 135 that mimics an envelope to indicate the arrival of an E-mail, and a telephone to notify the incoming call of the telephone. One punching hole 136 is provided, respectively.

The diffusion sheet 140 covers the light shielding mask 130 and has a planar shape that can be fitted to the recess 120a of the base 120. According to the diffusion sheet 140, by hiding the light of the second and third LEDs 112 and 113 passing through the punching holes 135 and 136, the punching holes 135 and 136 are concealed. Together, the present location of the second and third LEDs 112 and 113 cannot be recognized.

As illustrated in FIG. 26, the transparent display panel 154 has a planar shape that can be fitted to the concave portion 120a of the base 120, and is bent at approximately right angles to the first and second portions. The light guide portions 154a and 154b that are fitted into the two light guide grooves 121 and 123 are formed. In addition, the transparent display panel 154 may be formed by forming a pattern such as letters, symbols, figures, and the like in fine dimples and displaying the same.

As illustrated in FIG. 26, the cover 160 covers the surface of the base 120 and has a planar shape that can be fitted to the cover 160. The cover 160 covers the first and second light guide holes 122 and 125. The opening 166 is provided to surround. In addition, the cover 160 has a side wall corresponding to a short side of the base 120 among four sidewalls formed by bending the outer peripheral edge of each of the first and second locking poles of the base 120. The first and second elastic pole portions 167a and 167b which can be latched are formed at 128a and 128b, respectively.

Therefore, when assembling the display device, the first to fourth LEDs 111 to 114 are mounted at predetermined positions of the printed board 100. Meanwhile, after positioning the light blocking mask 130, the diffusion sheet 140, and the transparent display panel 154 in the recess 120a of the base 100, the first and second locking poles of the base 120 are positioned. The first and second elastic pole portions 167a and 167b are held at 128a and 128b, respectively (Fig. 27). Subsequently, assembly is completed by fixing the base 120 to the printed board 100.

Next, as a method of using the display device, for example, when the first and fourth LEDs 111 and 114 are turned on, the light of the first and fourth LEDs 111 and 114 is transmitted to the base 120. It is possible to enter from the light guide portions 154a and 154b of the transparent display panel 154 and reflect from the openings 166 of the cover 160 while reflecting from the inner surfaces of the light guide grooves 121 and 123. According to the present embodiment, since the light of the two first and fourth LEDs 111 and 114 is received, bright and uniform display is possible. When only the second LED 112 is lit, the light reflected from the tapered surface 122a provided in the light guide hole 122 of the base 120 passes through the punching hole 135 of the light shielding mask 130. As the light passes through the diffusion sheet 140 and the transparent display panel 154, a pattern for notifying reception of an E-mail from the opening 166 can be seen. In addition, when the first, fourth, and second LEDs 111, 114, and 112 are simultaneously turned on, the pattern of the envelope can be seen from the opening 166 of the cover 160 in the light emitting transparent display panel 154. have. In particular, since the brightness of the light passing through the punching hole 135 that mimics the envelope is high, the pattern can be clearly distinguished in the opening 166, and various inputs and outputs of other signals can be displayed.

Similarly, when only the third LED 113 is turned on, the light reflected from the tapered surface 125a provided in the light guiding hole 125 of the base 120 is a punching hole 136 that mimics the telephone of the light shielding mask 130. Penetrates. As the light passes through the diffusion sheet 140 and the transparent display panel 154, the pattern of the telephone to notify the incoming call of the telephone can be seen from the opening 166. In addition, when the first, third, and fourth LEDs 111, 113, and 114 are simultaneously turned on, the pattern of the telephone can be seen from the opening 166 of the cover 160 in the light emitting transparent display panel 154. have. In particular, since the luminance of the light passing through the punching hole 136 is higher, the pattern can be clearly distinguished in the opening portion 166, and various inputs and outputs of other signals and the like can be displayed.

In the above-described embodiment, since one set of three colors of LEDs is used, more colorful expression is possible by selecting the color of the LED to emit light.

As shown in FIG. 28, 7th Embodiment is substantially the same as 6th Embodiment, The difference is the recessed part (lower one step | step) by the center part of the recessed part 120a of the base 120. 120b) is formed and the diffusion sheet 170 is assembled to the said recessed part 120b.

According to the present embodiment, when the entire apparatus is thin and the diffusion distance between the transparent display panel 154 and the light source cannot be sufficiently secured, the light is further uniformed by using the two diffusion sheets 140 and 170. Can be diffused, making it impossible to recognize the presence of the LED.

As shown in FIG. 29, 8th Embodiment is the same as that of 6th Embodiment, The other point is a pair of fitting hole 120c, 120d formed in the bottom face of the recessed part 120a of the base 120. FIG. Is a case where the diffusion sheet 171 and the diffusion lens 172 are dropped and assembled. In addition, the lens 172 may be manufactured by integrally molding the base 120.

According to the present embodiment, light can be diffused by disposing the diffusion sheet 171 and the diffusion lens 172. For this reason, even when the transparent display panel 154 cannot secure a sufficient diffusion distance by the thinning of the base 120, there is an advantage in that light is uniformly diffused and the presence position of the LED cannot be recognized.

In addition, according to the present embodiment, by using a resin material (manufactured by Mitsubishi Engineering Plastics Co., Ltd.) that easily reflects the light of the LED and forming a tapered surface (see FIG. 17), the light passing through the transparent display panel 152 It was confirmed that the luminance became 1.98 times, and the luminance of the light passing through the light shielding mask 132 became 1.41 times.

In the above-described fifth to eighth embodiments, the printed circuit board can be used as a display device with a switching function by using the printed circuit board as an electrode plate or by laminating an electrode film or an electrode sheet on the printed board.

The display device according to the present invention can be combined not only with a touch switch but also with a mechanical switch.

The display device may be configured not only by stacking a plurality of transparent display panels on an electrode plate but also by stacking only one transparent display plate on an electrode plate.

Claims (17)

delete While the transparent electrode plate is sandwiched between the plurality of transparent display panels, light from a plurality of light sources respectively disposed on the front and back surfaces of the electrode plate is incident on the side end surface of the transparent display panel, and at least one side of the transparent display panel is provided. A display device characterized in that patterns of characters, figures, symbols, and the like can be viewed uniformly by reflecting from a plurality of minute dimples provided in the apparatus. 3. The method of claim 2, Uniformity is obtained by injecting light from a light source provided in the electrode plate onto the side end surface of at least one transparent display panel laminated on the electrode plate, and reflecting the light from a plurality of minute dimples provided on at least one side of the transparent display panel. Or display patterns such as letters, figures, symbols, and the like. The method of claim 2 or 3, A light guide portion for receiving light from a light source disposed on an electrode plate at one side edge of the transparent display panel and guiding the light to a side end surface of the transparent display panel. The method of claim 2 or 3, Between the transparent display panel disposed closest to the electrode plate and the electrode plate, a light shielding mask having a light diffusion sheet and punching holes for displaying patterns such as letters, figures, symbols, and the like is disposed, A display device, characterized by disposing a pattern light source at a position facing the punching hole. The method of claim 5, A surface on which a light shielding mask is visible has a low reflectance. The method of claim 2 or 3, A display device, wherein the transparent display panel is replaceable. The method of claim 2 or 3, A display device comprising dimples arranged at random. The method of claim 2 or 3, A display device comprising a control circuit for detecting a change in capacitance between an electrode provided on an electrode plate and a reference electrode, and controlling on / off of a light source. 3. The method of claim 2, A diffuser sheet and at least one transparent display panel are sequentially arranged on the visible surface side of the light shielding mask having a punching hole for displaying patterns such as letters, figures, symbols, and the like, and light of a light source is incident on the side cross-section of the transparent display panel. The light of a light source provided at a position facing the punching hole of the light shielding mask is transmitted through the plurality of minute dimples provided on at least one side of the transparent display panel, and passes through the punching hole and the transparent display panel. The display device which made it possible to make it look. The method of claim 10, A display device, wherein a diffusion sheet is disposed on the front and back surfaces of the light shielding mask. The method of claim 10, A display device, wherein a diffusion sheet is disposed on a surface side where a light shielding mask is visible, and a diffusion lens is disposed on a back side of the light shielding mask. The method of claim 10, And a light guide portion for receiving light from a light source and directing the light to a side cross section of the transparent display panel at at least one edge of the transparent display panel. The method of claim 13, A diffuser provided between a light guide portion and a small dimple of a transparent display panel allows light to be uniformly viewed or to display patterns such as letters, figures, and symbols. The method of claim 10, A surface on which a light shielding mask is visible has a low reflectance. The method of claim 10, A display device, wherein the transparent display panel is replaceable. The method of claim 10, A display device comprising dimples arranged at random.

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